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   1 /*
   2  * linux/drivers/ide/ide-taskfile.c     Version 0.38    March 05, 2003
   3  *
   4  *  Copyright (C) 2000-2002     Michael Cornwell <cornwell@acm.org>
   5  *  Copyright (C) 2000-2002     Andre Hedrick <andre@linux-ide.org>
   6  *  Copyright (C) 2001-2002     Klaus Smolin
   7  *                                      IBM Storage Technology Division
   8  *  Copyright (C) 2003-2004     Bartlomiej Zolnierkiewicz
   9  *
  10  *  The big the bad and the ugly.
  11  */
  12
  13 #include <linux/module.h>
  14 #include <linux/types.h>
  15 #include <linux/string.h>
  16 #include <linux/kernel.h>
  17 #include <linux/timer.h>
  18 #include <linux/mm.h>
  19 #include <linux/sched.h>
  20 #include <linux/interrupt.h>
  21 #include <linux/major.h>
  22 #include <linux/errno.h>
  23 #include <linux/genhd.h>
  24 #include <linux/blkpg.h>
  25 #include <linux/slab.h>
  26 #include <linux/pci.h>
  27 #include <linux/delay.h>
  28 #include <linux/hdreg.h>
  29 #include <linux/ide.h>
  30 #include <linux/bitops.h>
  31 #include <linux/scatterlist.h>
  32
  33 #include <asm/byteorder.h>
  34 #include <asm/irq.h>
  35 #include <asm/uaccess.h>
  36 #include <asm/io.h>
  37
  38 static void ata_bswap_data (void *buffer, int wcount)
  39 {
  40         u16 *p = buffer;
  41
  42         while (wcount--) {
  43                 *p = *p << 8 | *p >> 8; p++;
  44                 *p = *p << 8 | *p >> 8; p++;
  45         }
  46 }
  47
  48 static void taskfile_input_data(ide_drive_t *drive, void *buffer, u32 wcount)
  49 {
  50         HWIF(drive)->ata_input_data(drive, buffer, wcount);
  51         if (drive->bswap)
  52                 ata_bswap_data(buffer, wcount);
  53 }
  54
  55 static void taskfile_output_data(ide_drive_t *drive, void *buffer, u32 wcount)
  56 {
  57         if (drive->bswap) {
  58                 ata_bswap_data(buffer, wcount);
  59                 HWIF(drive)->ata_output_data(drive, buffer, wcount);
  60                 ata_bswap_data(buffer, wcount);
  61         } else {
  62                 HWIF(drive)->ata_output_data(drive, buffer, wcount);
  63         }
  64 }
  65
  66 void ide_tf_load(ide_drive_t *drive, ide_task_t *task)
  67 {
  68         ide_hwif_t *hwif = drive->hwif;
  69         struct ide_taskfile *tf = &task->tf;
  70         u8 HIHI = (task->tf_flags & IDE_TFLAG_LBA48) ? 0xE0 : 0xEF;
  71
  72         if (IDE_CONTROL_REG)
  73                 hwif->OUTB(drive->ctl, IDE_CONTROL_REG); /* clear nIEN */
  74
  75         if ((task->tf_flags & IDE_TFLAG_NO_SELECT_MASK) == 0)
  76                 SELECT_MASK(drive, 0);
  77
  78         if (task->tf_flags & IDE_TFLAG_LBA48) {
  79                 hwif->OUTB(tf->hob_feature, IDE_FEATURE_REG);
  80                 hwif->OUTB(tf->hob_nsect, IDE_NSECTOR_REG);
  81                 hwif->OUTB(tf->hob_lbal, IDE_SECTOR_REG);
  82                 hwif->OUTB(tf->hob_lbam, IDE_LCYL_REG);
  83                 hwif->OUTB(tf->hob_lbah, IDE_HCYL_REG);
  84         }
  85
  86         hwif->OUTB(tf->feature, IDE_FEATURE_REG);
  87         hwif->OUTB(tf->nsect, IDE_NSECTOR_REG);
  88         hwif->OUTB(tf->lbal, IDE_SECTOR_REG);
  89         hwif->OUTB(tf->lbam, IDE_LCYL_REG);
  90         hwif->OUTB(tf->lbah, IDE_HCYL_REG);
  91
  92         hwif->OUTB((tf->device & HIHI) | drive->select.all, IDE_SELECT_REG);
  93 }
  94
  95 EXPORT_SYMBOL_GPL(ide_tf_load);
  96
  97 int taskfile_lib_get_identify (ide_drive_t *drive, u8 *buf)
  98 {
  99         ide_task_t args;
 100
 101         memset(&args, 0, sizeof(ide_task_t));
 102         args.tf.nsect = 0x01;
 103         if (drive->media == ide_disk)
 104                 args.tf.command = WIN_IDENTIFY;
 105         else
 106                 args.tf.command = WIN_PIDENTIFY;
 107         args.command_type = IDE_DRIVE_TASK_IN;
 108         args.data_phase   = TASKFILE_IN;
 109         args.handler      = &task_in_intr;
 110         return ide_raw_taskfile(drive, &args, buf);
 111 }
 112
 113 ide_startstop_t do_rw_taskfile (ide_drive_t *drive, ide_task_t *task)
 114 {
 115         ide_hwif_t *hwif        = HWIF(drive);
 116         struct ide_taskfile *tf = &task->tf;
 117
 118         if (drive->addressing == 1)
 119                 task->tf_flags |= IDE_TFLAG_LBA48;
 120
 121         ide_tf_load(drive, task);
 122
 123         if (task->handler != NULL) {
 124                 if (task->prehandler != NULL) {
 125                         hwif->OUTBSYNC(drive, tf->command, IDE_COMMAND_REG);
 126                         ndelay(400);    /* FIXME */
 127                         return task->prehandler(drive, task->rq);
 128                 }
 129                 ide_execute_command(drive, tf->command, task->handler, WAIT_WORSTCASE, NULL);
 130                 return ide_started;
 131         }
 132
 133         if (!drive->using_dma)
 134                 return ide_stopped;
 135
 136         switch (tf->command) {
 137                 case WIN_WRITEDMA_ONCE:
 138                 case WIN_WRITEDMA:
 139                 case WIN_WRITEDMA_EXT:
 140                 case WIN_READDMA_ONCE:
 141                 case WIN_READDMA:
 142                 case WIN_READDMA_EXT:
 143                 case WIN_IDENTIFY_DMA:
 144                         if (!hwif->dma_setup(drive)) {
 145                                 hwif->dma_exec_cmd(drive, tf->command);
 146                                 hwif->dma_start(drive);
 147                                 return ide_started;
 148                         }
 149                         break;
 150                 default:
 151                         if (task->handler == NULL)
 152                                 return ide_stopped;
 153         }
 154
 155         return ide_stopped;
 156 }
 157
 158 /*
 159  * set_multmode_intr() is invoked on completion of a WIN_SETMULT cmd.
 160  */
 161 ide_startstop_t set_multmode_intr (ide_drive_t *drive)
 162 {
 163         ide_hwif_t *hwif = HWIF(drive);
 164         u8 stat;
 165
 166         if (OK_STAT(stat = hwif->INB(IDE_STATUS_REG),READY_STAT,BAD_STAT)) {
 167                 drive->mult_count = drive->mult_req;
 168         } else {
 169                 drive->mult_req = drive->mult_count = 0;
 170                 drive->special.b.recalibrate = 1;
 171                 (void) ide_dump_status(drive, "set_multmode", stat);
 172         }
 173         return ide_stopped;
 174 }
 175
 176 /*
 177  * set_geometry_intr() is invoked on completion of a WIN_SPECIFY cmd.
 178  */
 179 ide_startstop_t set_geometry_intr (ide_drive_t *drive)
 180 {
 181         ide_hwif_t *hwif = HWIF(drive);
 182         int retries = 5;
 183         u8 stat;
 184
 185         while (((stat = hwif->INB(IDE_STATUS_REG)) & BUSY_STAT) && retries--)
 186                 udelay(10);
 187
 188         if (OK_STAT(stat, READY_STAT, BAD_STAT))
 189                 return ide_stopped;
 190
 191         if (stat & (ERR_STAT|DRQ_STAT))
 192                 return ide_error(drive, "set_geometry_intr", stat);
 193
 194         BUG_ON(HWGROUP(drive)->handler != NULL);
 195         ide_set_handler(drive, &set_geometry_intr, WAIT_WORSTCASE, NULL);
 196         return ide_started;
 197 }
 198
 199 /*
 200  * recal_intr() is invoked on completion of a WIN_RESTORE (recalibrate) cmd.
 201  */
 202 ide_startstop_t recal_intr (ide_drive_t *drive)
 203 {
 204         ide_hwif_t *hwif = HWIF(drive);
 205         u8 stat;
 206
 207         if (!OK_STAT(stat = hwif->INB(IDE_STATUS_REG), READY_STAT, BAD_STAT))
 208                 return ide_error(drive, "recal_intr", stat);
 209         return ide_stopped;
 210 }
 211
 212 /*
 213  * Handler for commands without a data phase
 214  */
 215 ide_startstop_t task_no_data_intr (ide_drive_t *drive)
 216 {
 217         ide_task_t *args        = HWGROUP(drive)->rq->special;
 218         ide_hwif_t *hwif        = HWIF(drive);
 219         u8 stat;
 220
 221         local_irq_enable_in_hardirq();
 222         if (!OK_STAT(stat = hwif->INB(IDE_STATUS_REG),READY_STAT,BAD_STAT)) {
 223                 return ide_error(drive, "task_no_data_intr", stat);
 224                 /* calls ide_end_drive_cmd */
 225         }
 226         if (args)
 227                 ide_end_drive_cmd(drive, stat, hwif->INB(IDE_ERROR_REG));
 228
 229         return ide_stopped;
 230 }
 231
 232 EXPORT_SYMBOL(task_no_data_intr);
 233
 234 static u8 wait_drive_not_busy(ide_drive_t *drive)
 235 {
 236         ide_hwif_t *hwif = HWIF(drive);
 237         int retries;
 238         u8 stat;
 239
 240         /*
 241          * Last sector was transfered, wait until drive is ready.
 242          * This can take up to 10 usec, but we will wait max 1 ms
 243          * (drive_cmd_intr() waits that long).
 244          */
 245         for (retries = 0; retries < 100; retries++) {
 246                 if ((stat = hwif->INB(IDE_STATUS_REG)) & BUSY_STAT)
 247                         udelay(10);
 248                 else
 249                         break;
 250         }
 251
 252         if (stat & BUSY_STAT)
 253                 printk(KERN_ERR "%s: drive still BUSY!\n", drive->name);
 254
 255         return stat;
 256 }
 257
 258 static void ide_pio_sector(ide_drive_t *drive, unsigned int write)
 259 {
 260         ide_hwif_t *hwif = drive->hwif;
 261         struct scatterlist *sg = hwif->sg_table;
 262         struct scatterlist *cursg = hwif->cursg;
 263         struct page *page;
 264 #ifdef CONFIG_HIGHMEM
 265         unsigned long flags;
 266 #endif
 267         unsigned int offset;
 268         u8 *buf;
 269
 270         cursg = hwif->cursg;
 271         if (!cursg) {
 272                 cursg = sg;
 273                 hwif->cursg = sg;
 274         }
 275
 276         page = sg_page(cursg);
 277         offset = cursg->offset + hwif->cursg_ofs * SECTOR_SIZE;
 278
 279         /* get the current page and offset */
 280         page = nth_page(page, (offset >> PAGE_SHIFT));
 281         offset %= PAGE_SIZE;
 282
 283 #ifdef CONFIG_HIGHMEM
 284         local_irq_save(flags);
 285 #endif
 286         buf = kmap_atomic(page, KM_BIO_SRC_IRQ) + offset;
 287
 288         hwif->nleft--;
 289         hwif->cursg_ofs++;
 290
 291         if ((hwif->cursg_ofs * SECTOR_SIZE) == cursg->length) {
 292                 hwif->cursg = sg_next(hwif->cursg);
 293                 hwif->cursg_ofs = 0;
 294         }
 295
 296         /* do the actual data transfer */
 297         if (write)
 298                 taskfile_output_data(drive, buf, SECTOR_WORDS);
 299         else
 300                 taskfile_input_data(drive, buf, SECTOR_WORDS);
 301
 302         kunmap_atomic(buf, KM_BIO_SRC_IRQ);
 303 #ifdef CONFIG_HIGHMEM
 304         local_irq_restore(flags);
 305 #endif
 306 }
 307
 308 static void ide_pio_multi(ide_drive_t *drive, unsigned int write)
 309 {
 310         unsigned int nsect;
 311
 312         nsect = min_t(unsigned int, drive->hwif->nleft, drive->mult_count);
 313         while (nsect--)
 314                 ide_pio_sector(drive, write);
 315 }
 316
 317 static void ide_pio_datablock(ide_drive_t *drive, struct request *rq,
 318                                      unsigned int write)
 319 {
 320         if (rq->bio)    /* fs request */
 321                 rq->errors = 0;
 322
 323         touch_softlockup_watchdog();
 324
 325         switch (drive->hwif->data_phase) {
 326         case TASKFILE_MULTI_IN:
 327         case TASKFILE_MULTI_OUT:
 328                 ide_pio_multi(drive, write);
 329                 break;
 330         default:
 331                 ide_pio_sector(drive, write);
 332                 break;
 333         }
 334 }
 335
 336 static ide_startstop_t task_error(ide_drive_t *drive, struct request *rq,
 337                                   const char *s, u8 stat)
 338 {
 339         if (rq->bio) {
 340                 ide_hwif_t *hwif = drive->hwif;
 341                 int sectors = hwif->nsect - hwif->nleft;
 342
 343                 switch (hwif->data_phase) {
 344                 case TASKFILE_IN:
 345                         if (hwif->nleft)
 346                                 break;
 347                         /* fall through */
 348                 case TASKFILE_OUT:
 349                         sectors--;
 350                         break;
 351                 case TASKFILE_MULTI_IN:
 352                         if (hwif->nleft)
 353                                 break;
 354                         /* fall through */
 355                 case TASKFILE_MULTI_OUT:
 356                         sectors -= drive->mult_count;
 357                 default:
 358                         break;
 359                 }
 360
 361                 if (sectors > 0) {
 362                         ide_driver_t *drv;
 363
 364                         drv = *(ide_driver_t **)rq->rq_disk->private_data;
 365                         drv->end_request(drive, 1, sectors);
 366                 }
 367         }
 368         return ide_error(drive, s, stat);
 369 }
 370
 371 static void task_end_request(ide_drive_t *drive, struct request *rq, u8 stat)
 372 {
 373         HWIF(drive)->cursg = NULL;
 374
 375         if (rq->cmd_type == REQ_TYPE_ATA_TASKFILE) {
 376                 ide_task_t *task = rq->special;
 377
 378                 if (task->tf_out_flags.all) {
 379                         u8 err = drive->hwif->INB(IDE_ERROR_REG);
 380                         ide_end_drive_cmd(drive, stat, err);
 381                         return;
 382                 }
 383         }
 384
 385         if (rq->rq_disk) {
 386                 ide_driver_t *drv;
 387
 388                 drv = *(ide_driver_t **)rq->rq_disk->private_data;;
 389                 drv->end_request(drive, 1, rq->hard_nr_sectors);
 390         } else
 391                 ide_end_request(drive, 1, rq->hard_nr_sectors);
 392 }
 393
 394 /*
 395  * Handler for command with PIO data-in phase (Read/Read Multiple).
 396  */
 397 ide_startstop_t task_in_intr (ide_drive_t *drive)
 398 {
 399         ide_hwif_t *hwif = drive->hwif;
 400         struct request *rq = HWGROUP(drive)->rq;
 401         u8 stat = hwif->INB(IDE_STATUS_REG);
 402
 403         /* new way for dealing with premature shared PCI interrupts */
 404         if (!OK_STAT(stat, DATA_READY, BAD_R_STAT)) {
 405                 if (stat & (ERR_STAT | DRQ_STAT))
 406                         return task_error(drive, rq, __FUNCTION__, stat);
 407                 /* No data yet, so wait for another IRQ. */
 408                 ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL);
 409                 return ide_started;
 410         }
 411
 412         ide_pio_datablock(drive, rq, 0);
 413
 414         /* If it was the last datablock check status and finish transfer. */
 415         if (!hwif->nleft) {
 416                 stat = wait_drive_not_busy(drive);
 417                 if (!OK_STAT(stat, 0, BAD_R_STAT))
 418                         return task_error(drive, rq, __FUNCTION__, stat);
 419                 task_end_request(drive, rq, stat);
 420                 return ide_stopped;
 421         }
 422
 423         /* Still data left to transfer. */
 424         ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL);
 425
 426         return ide_started;
 427 }
 428 EXPORT_SYMBOL(task_in_intr);
 429
 430 /*
 431  * Handler for command with PIO data-out phase (Write/Write Multiple).
 432  */
 433 static ide_startstop_t task_out_intr (ide_drive_t *drive)
 434 {
 435         ide_hwif_t *hwif = drive->hwif;
 436         struct request *rq = HWGROUP(drive)->rq;
 437         u8 stat = hwif->INB(IDE_STATUS_REG);
 438
 439         if (!OK_STAT(stat, DRIVE_READY, drive->bad_wstat))
 440                 return task_error(drive, rq, __FUNCTION__, stat);
 441
 442         /* Deal with unexpected ATA data phase. */
 443         if (((stat & DRQ_STAT) == 0) ^ !hwif->nleft)
 444                 return task_error(drive, rq, __FUNCTION__, stat);
 445
 446         if (!hwif->nleft) {
 447                 task_end_request(drive, rq, stat);
 448                 return ide_stopped;
 449         }
 450
 451         /* Still data left to transfer. */
 452         ide_pio_datablock(drive, rq, 1);
 453         ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL);
 454
 455         return ide_started;
 456 }
 457
 458 ide_startstop_t pre_task_out_intr (ide_drive_t *drive, struct request *rq)
 459 {
 460         ide_startstop_t startstop;
 461
 462         if (ide_wait_stat(&startstop, drive, DATA_READY,
 463                           drive->bad_wstat, WAIT_DRQ)) {
 464                 printk(KERN_ERR "%s: no DRQ after issuing %sWRITE%s\n",
 465                                 drive->name,
 466                                 drive->hwif->data_phase ? "MULT" : "",
 467                                 drive->addressing ? "_EXT" : "");
 468                 return startstop;
 469         }
 470
 471         if (!drive->unmask)
 472                 local_irq_disable();
 473
 474         ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL);
 475         ide_pio_datablock(drive, rq, 1);
 476
 477         return ide_started;
 478 }
 479 EXPORT_SYMBOL(pre_task_out_intr);
 480
 481 static int ide_diag_taskfile(ide_drive_t *drive, ide_task_t *args, unsigned long data_size, u8 *buf)
 482 {
 483         struct request rq;
 484
 485         memset(&rq, 0, sizeof(rq));
 486         rq.ref_count = 1;
 487         rq.cmd_type = REQ_TYPE_ATA_TASKFILE;
 488         rq.buffer = buf;
 489
 490         /*
 491          * (ks) We transfer currently only whole sectors.
 492          * This is suffient for now.  But, it would be great,
 493          * if we would find a solution to transfer any size.
 494          * To support special commands like READ LONG.
 495          */
 496         if (args->command_type != IDE_DRIVE_TASK_NO_DATA) {
 497                 if (data_size == 0)
 498                         rq.nr_sectors = (args->tf.hob_nsect << 8) | args->tf.nsect;
 499                 else
 500                         rq.nr_sectors = data_size / SECTOR_SIZE;
 501
 502                 if (!rq.nr_sectors) {
 503                         printk(KERN_ERR "%s: in/out command without data\n",
 504                                         drive->name);
 505                         return -EFAULT;
 506                 }
 507
 508                 rq.hard_nr_sectors = rq.nr_sectors;
 509                 rq.hard_cur_sectors = rq.current_nr_sectors = rq.nr_sectors;
 510
 511                 if (args->command_type == IDE_DRIVE_TASK_RAW_WRITE)
 512                         rq.cmd_flags |= REQ_RW;
 513         }
 514
 515         rq.special = args;
 516         args->rq = &rq;
 517         return ide_do_drive_cmd(drive, &rq, ide_wait);
 518 }
 519
 520 int ide_raw_taskfile (ide_drive_t *drive, ide_task_t *args, u8 *buf)
 521 {
 522         return ide_diag_taskfile(drive, args, 0, buf);
 523 }
 524
 525 EXPORT_SYMBOL(ide_raw_taskfile);
 526
 527 #ifdef CONFIG_IDE_TASK_IOCTL
 528 int ide_taskfile_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
 529 {
 530         ide_task_request_t      *req_task;
 531         ide_task_t              args;
 532         u8 *outbuf              = NULL;
 533         u8 *inbuf               = NULL;
 534         int err                 = 0;
 535         int tasksize            = sizeof(struct ide_task_request_s);
 536         unsigned int taskin     = 0;
 537         unsigned int taskout    = 0;
 538         u8 io_32bit             = drive->io_32bit;
 539         char __user *buf = (char __user *)arg;
 540
 541 //      printk("IDE Taskfile ...\n");
 542
 543         req_task = kzalloc(tasksize, GFP_KERNEL);
 544         if (req_task == NULL) return -ENOMEM;
 545         if (copy_from_user(req_task, buf, tasksize)) {
 546                 kfree(req_task);
 547                 return -EFAULT;
 548         }
 549
 550         taskout = req_task->out_size;
 551         taskin  = req_task->in_size;
 552
 553         if (taskin > 65536 || taskout > 65536) {
 554                 err = -EINVAL;
 555                 goto abort;
 556         }
 557
 558         if (taskout) {
 559                 int outtotal = tasksize;
 560                 outbuf = kzalloc(taskout, GFP_KERNEL);
 561                 if (outbuf == NULL) {
 562                         err = -ENOMEM;
 563                         goto abort;
 564                 }
 565                 if (copy_from_user(outbuf, buf + outtotal, taskout)) {
 566                         err = -EFAULT;
 567                         goto abort;
 568                 }
 569         }
 570
 571         if (taskin) {
 572                 int intotal = tasksize + taskout;
 573                 inbuf = kzalloc(taskin, GFP_KERNEL);
 574                 if (inbuf == NULL) {
 575                         err = -ENOMEM;
 576                         goto abort;
 577                 }
 578                 if (copy_from_user(inbuf, buf + intotal, taskin)) {
 579                         err = -EFAULT;
 580                         goto abort;
 581                 }
 582         }
 583
 584         memset(&args, 0, sizeof(ide_task_t));
 585
 586         memcpy(&args.tf_array[0], req_task->hob_ports, HDIO_DRIVE_HOB_HDR_SIZE - 2);
 587         memcpy(&args.tf_array[6], req_task->io_ports, HDIO_DRIVE_TASK_HDR_SIZE);
 588         args.tf_in_flags  = req_task->in_flags;
 589         args.tf_out_flags = req_task->out_flags;
 590         args.data_phase   = req_task->data_phase;
 591         args.command_type = req_task->req_cmd;
 592
 593         drive->io_32bit = 0;
 594         switch(req_task->data_phase) {
 595                 case TASKFILE_OUT_DMAQ:
 596                 case TASKFILE_OUT_DMA:
 597                         err = ide_diag_taskfile(drive, &args, taskout, outbuf);
 598                         break;
 599                 case TASKFILE_IN_DMAQ:
 600                 case TASKFILE_IN_DMA:
 601                         err = ide_diag_taskfile(drive, &args, taskin, inbuf);
 602                         break;
 603                 case TASKFILE_MULTI_OUT:
 604                         if (!drive->mult_count) {
 605                                 /* (hs): give up if multcount is not set */
 606                                 printk(KERN_ERR "%s: %s Multimode Write " \
 607                                         "multcount is not set\n",
 608                                         drive->name, __FUNCTION__);
 609                                 err = -EPERM;
 610                                 goto abort;
 611                         }
 612                         /* fall through */
 613                 case TASKFILE_OUT:
 614                         args.prehandler = &pre_task_out_intr;
 615                         args.handler = &task_out_intr;
 616                         err = ide_diag_taskfile(drive, &args, taskout, outbuf);
 617                         break;
 618                 case TASKFILE_MULTI_IN:
 619                         if (!drive->mult_count) {
 620                                 /* (hs): give up if multcount is not set */
 621                                 printk(KERN_ERR "%s: %s Multimode Read failure " \
 622                                         "multcount is not set\n",
 623                                         drive->name, __FUNCTION__);
 624                                 err = -EPERM;
 625                                 goto abort;
 626                         }
 627                         /* fall through */
 628                 case TASKFILE_IN:
 629                         args.handler = &task_in_intr;
 630                         err = ide_diag_taskfile(drive, &args, taskin, inbuf);
 631                         break;
 632                 case TASKFILE_NO_DATA:
 633                         args.handler = &task_no_data_intr;
 634                         err = ide_diag_taskfile(drive, &args, 0, NULL);
 635                         break;
 636                 default:
 637                         err = -EFAULT;
 638                         goto abort;
 639         }
 640
 641         memcpy(req_task->hob_ports, &args.tf_array[0], HDIO_DRIVE_HOB_HDR_SIZE - 2);
 642         memcpy(req_task->io_ports, &args.tf_array[6], HDIO_DRIVE_TASK_HDR_SIZE);
 643         req_task->in_flags  = args.tf_in_flags;
 644         req_task->out_flags = args.tf_out_flags;
 645
 646         if (copy_to_user(buf, req_task, tasksize)) {
 647                 err = -EFAULT;
 648                 goto abort;
 649         }
 650         if (taskout) {
 651                 int outtotal = tasksize;
 652                 if (copy_to_user(buf + outtotal, outbuf, taskout)) {
 653                         err = -EFAULT;
 654                         goto abort;
 655                 }
 656         }
 657         if (taskin) {
 658                 int intotal = tasksize + taskout;
 659                 if (copy_to_user(buf + intotal, inbuf, taskin)) {
 660                         err = -EFAULT;
 661                         goto abort;
 662                 }
 663         }
 664 abort:
 665         kfree(req_task);
 666         kfree(outbuf);
 667         kfree(inbuf);
 668
 669 //      printk("IDE Taskfile ioctl ended. rc = %i\n", err);
 670
 671         drive->io_32bit = io_32bit;
 672
 673         return err;
 674 }
 675 #endif
 676
 677 int ide_wait_cmd (ide_drive_t *drive, u8 cmd, u8 nsect, u8 feature, u8 sectors, u8 *buf)
 678 {
 679         struct request rq;
 680         u8 buffer[4];
 681
 682         if (!buf)
 683                 buf = buffer;
 684         memset(buf, 0, 4 + SECTOR_WORDS * 4 * sectors);
 685         ide_init_drive_cmd(&rq);
 686         rq.buffer = buf;
 687         *buf++ = cmd;
 688         *buf++ = nsect;
 689         *buf++ = feature;
 690         *buf++ = sectors;
 691         return ide_do_drive_cmd(drive, &rq, ide_wait);
 692 }
 693
 694 int ide_cmd_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
 695 {
 696         int err = 0;
 697         u8 args[4], *argbuf = args;
 698         u8 xfer_rate = 0;
 699         int argsize = 4;
 700         ide_task_t tfargs;
 701         struct ide_taskfile *tf = &tfargs.tf;
 702
 703         if (NULL == (void *) arg) {
 704                 struct request rq;
 705                 ide_init_drive_cmd(&rq);
 706                 return ide_do_drive_cmd(drive, &rq, ide_wait);
 707         }
 708
 709         if (copy_from_user(args, (void __user *)arg, 4))
 710                 return -EFAULT;
 711
 712         memset(&tfargs, 0, sizeof(ide_task_t));
 713         tf->feature = args[2];
 714         tf->nsect   = args[3];
 715         tf->lbal    = args[1];
 716         tf->command = args[0];
 717
 718         if (args[3]) {
 719                 argsize = 4 + (SECTOR_WORDS * 4 * args[3]);
 720                 argbuf = kzalloc(argsize, GFP_KERNEL);
 721                 if (argbuf == NULL)
 722                         return -ENOMEM;
 723         }
 724         if (set_transfer(drive, &tfargs)) {
 725                 xfer_rate = args[1];
 726                 if (ide_ata66_check(drive, &tfargs))
 727                         goto abort;
 728         }
 729
 730         err = ide_wait_cmd(drive, args[0], args[1], args[2], args[3], argbuf);
 731
 732         if (!err && xfer_rate) {
 733                 /* active-retuning-calls future */
 734                 ide_set_xfer_rate(drive, xfer_rate);
 735                 ide_driveid_update(drive);
 736         }
 737 abort:
 738         if (copy_to_user((void __user *)arg, argbuf, argsize))
 739                 err = -EFAULT;
 740         if (argsize > 4)
 741                 kfree(argbuf);
 742         return err;
 743 }
 744
 745 static int ide_wait_cmd_task(ide_drive_t *drive, u8 *buf)
 746 {
 747         struct request rq;
 748
 749         ide_init_drive_cmd(&rq);
 750         rq.cmd_type = REQ_TYPE_ATA_TASK;
 751         rq.buffer = buf;
 752         return ide_do_drive_cmd(drive, &rq, ide_wait);
 753 }
 754
 755 int ide_task_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
 756 {
 757         void __user *p = (void __user *)arg;
 758         int err = 0;
 759         u8 args[7], *argbuf = args;
 760         int argsize = 7;
 761
 762         if (copy_from_user(args, p, 7))
 763                 return -EFAULT;
 764         err = ide_wait_cmd_task(drive, argbuf);
 765         if (copy_to_user(p, argbuf, argsize))
 766                 err = -EFAULT;
 767         return err;
 768 }
 769
 770 /*
 771  * NOTICE: This is additions from IBM to provide a discrete interface,
 772  * for selective taskregister access operations.  Nice JOB Klaus!!!
 773  * Glad to be able to work and co-develop this with you and IBM.
 774  */
 775 ide_startstop_t flagged_taskfile (ide_drive_t *drive, ide_task_t *task)
 776 {
 777         ide_hwif_t *hwif        = HWIF(drive);
 778         struct ide_taskfile *tf = &task->tf;
 779
 780         if (task->data_phase == TASKFILE_MULTI_IN ||
 781             task->data_phase == TASKFILE_MULTI_OUT) {
 782                 if (!drive->mult_count) {
 783                         printk(KERN_ERR "%s: multimode not set!\n", drive->name);
 784                         return ide_stopped;
 785                 }
 786         }
 787
 788         /*
 789          * (ks) Check taskfile in flags.
 790          * If set, then execute as it is defined.
 791          * If not set, then define default settings.
 792          * The default values are:
 793          *      read all taskfile registers (except data)
 794          *      read the hob registers (sector, nsector, lcyl, hcyl)
 795          */
 796         if (task->tf_in_flags.all == 0) {
 797                 task->tf_in_flags.all = IDE_TASKFILE_STD_IN_FLAGS;
 798                 if (drive->addressing == 1)
 799                         task->tf_in_flags.all |= (IDE_HOB_STD_IN_FLAGS  << 8);
 800         }
 801
 802         /* ALL Command Block Executions SHALL clear nIEN, unless otherwise */
 803         if (IDE_CONTROL_REG)
 804                 /* clear nIEN */
 805                 hwif->OUTB(drive->ctl, IDE_CONTROL_REG);
 806         SELECT_MASK(drive, 0);
 807
 808         if (task->tf_out_flags.b.data)
 809                 hwif->OUTW((tf->hob_data << 8) | tf->data, IDE_DATA_REG);
 810
 811         /* (ks) send hob registers first */
 812         if (task->tf_out_flags.b.nsector_hob)
 813                 hwif->OUTB(tf->hob_nsect, IDE_NSECTOR_REG);
 814         if (task->tf_out_flags.b.sector_hob)
 815                 hwif->OUTB(tf->hob_lbal, IDE_SECTOR_REG);
 816         if (task->tf_out_flags.b.lcyl_hob)
 817                 hwif->OUTB(tf->hob_lbam, IDE_LCYL_REG);
 818         if (task->tf_out_flags.b.hcyl_hob)
 819                 hwif->OUTB(tf->hob_lbah, IDE_HCYL_REG);
 820
 821         /* (ks) Send now the standard registers */
 822         if (task->tf_out_flags.b.error_feature)
 823                 hwif->OUTB(tf->feature, IDE_FEATURE_REG);
 824         /* refers to number of sectors to transfer */
 825         if (task->tf_out_flags.b.nsector)
 826                 hwif->OUTB(tf->nsect, IDE_NSECTOR_REG);
 827         /* refers to sector offset or start sector */
 828         if (task->tf_out_flags.b.sector)
 829                 hwif->OUTB(tf->lbal, IDE_SECTOR_REG);
 830         if (task->tf_out_flags.b.lcyl)
 831                 hwif->OUTB(tf->lbam, IDE_LCYL_REG);
 832         if (task->tf_out_flags.b.hcyl)
 833                 hwif->OUTB(tf->lbah, IDE_HCYL_REG);
 834
 835         /*
 836          * (ks) In the flagged taskfile approch, we will use all specified
 837          * registers and the register value will not be changed, except the
 838          * select bit (master/slave) in the drive_head register. We must make
 839          * sure that the desired drive is selected.
 840          */
 841         hwif->OUTB(tf->device | drive->select.all, IDE_SELECT_REG);
 842         switch(task->data_phase) {
 843
 844                 case TASKFILE_OUT_DMAQ:
 845                 case TASKFILE_OUT_DMA:
 846                 case TASKFILE_IN_DMAQ:
 847                 case TASKFILE_IN_DMA:
 848                         if (!drive->using_dma)
 849                                 break;
 850
 851                         if (!hwif->dma_setup(drive)) {
 852                                 hwif->dma_exec_cmd(drive, tf->command);
 853                                 hwif->dma_start(drive);
 854                                 return ide_started;
 855                         }
 856                         break;
 857
 858                 default:
 859                         if (task->handler == NULL)
 860                                 return ide_stopped;
 861
 862                         /* Issue the command */
 863                         if (task->prehandler) {
 864                                 hwif->OUTBSYNC(drive, tf->command, IDE_COMMAND_REG);
 865                                 ndelay(400);    /* FIXME */
 866                                 return task->prehandler(drive, task->rq);
 867                         }
 868                         ide_execute_command(drive, tf->command, task->handler, WAIT_WORSTCASE, NULL);
 869                         return ide_started;
 870         }
 871
 872         return ide_stopped;
 873 }